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Local Search Algorithms

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Questions and Answers

What type of search trees are used in planning under uncertainty?

Decision trees

OR-AND search trees

AND-OR search trees (correct)

OR search trees

Which of the following is NOT a type of local search algorithm?

Genetic algorithms

Hill-climbing search

Simulated annealing

Breadth-first search (correct)

In sensorless problem solving, what is the agent's situation?

The agent has partial observations

The agent has uncertain knowledge

The agent has no observation (correct)

The agent has complete knowledge of the environment

What is the main difference between an AND node and an OR node in an AND-OR search tree?

An AND node represents a conjunction, an OR node represents a disjunction Signup and view all the answers

Which of the following is an example of a problem formulation?

The erratic vacuum world Signup and view all the answers

What is the main difference between a local search algorithm and a systematic search algorithm?

Systematic search algorithms are complete, local search algorithms are not Signup and view all the answers

Study Notes

Local Search Algorithms

Primarily designed for pure optimization problems, aiming to identify the best possible state based on an objective function.

State-Space Landscape

The concept of state-space landscape is critical for understanding local search methodologies.
It represents the different states available in an optimization problem and their relationships to each other.

Local Beam Search

A local beam search operates by exploring multiple states in parallel and shares useful information among these threads to enhance search efficiency.
May suffer from limited diversity when exploring k states, potentially causing the search to focus too narrowly in a confined area of the state space.
This concentration can lead to suboptimal solutions as it might overlook broader areas that could contain better states.

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Description

Learn about local search algorithms and how they are used to solve pure optimization problems. Understand the concept of state-space landscape and its relation to local search.